CN117454575A - Wind power blade trailing edge design method and system - Google Patents

Wind power blade trailing edge design method and system Download PDF

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Publication number
CN117454575A
CN117454575A CN202311072578.3A CN202311072578A CN117454575A CN 117454575 A CN117454575 A CN 117454575A CN 202311072578 A CN202311072578 A CN 202311072578A CN 117454575 A CN117454575 A CN 117454575A
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Prior art keywords
core
thickness
interval
thickness distribution
core material
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Inventor
董传林
王维海
夏玉洲
江宁
张有鹏
杨栋
赵秋阳
王丹
徐强
许佳琪
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Huaneng Da'an Clean Energy Power Co ltd
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Huaneng Da'an Clean Energy Power Co ltd
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Priority to CN202311072578.3A priority Critical patent/CN117454575A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00—Details relating to the application field
    • G06F2113/06—Wind turbines or wind farms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/18—Manufacturability analysis or optimisation for manufacturability

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  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Graphics (AREA)
  • Software Systems (AREA)
  • Wind Motors (AREA)

Abstract

The invention belongs to the field of design optimization of wind power blade production process, and the method comprises the steps of determining the boundary of a design interval according to input parameters and setting thickness points in the interval; calculating the thickness distribution of each position according to the obtained interval boundary and parameters of the layering and staggered layering, and superposing to obtain UD thickness distribution data of each thickness distribution point, and superposing to obtain interval distribution data; mapping the thickness distribution data into a three-dimensional model, creating a visual model, and adjusting the distance between the core material and the side and the distance between the core material and the UD to obtain a reasonable die assembly gap through an application program, thereby completing the design of the die assembly size of the cross section. The invention has simple input parameters and convenient operation; the thickness of each point is calculated completely according to the layering of the UD, the chamfer angle of the core material is completely consistent with the actual value, and the precision is high; the gap adjustment of one section can be completed in a few minutes, and the efficiency is high.

Description

Wind power blade trailing edge design method and system
Technical Field
The invention relates to the field of wind power blade production process design optimization, and provides a wind power blade trailing edge design method.
Background
The trailing edge design of the wind driven generator blade has important significance for improving wind energy conversion efficiency and reducing cost. The traditional wind power blade trailing edge design method mainly adopts a pneumatic optimization strategy, and aerodynamic resistance and noise are reduced by changing the shape and parameters of the blade, so that the starting performance of the blade is improved. However, this design method has certain limitations,
after the structural design of the wind power blade is completed, the detailed process practicality design is required, wherein the top die and the super-thick gap of the blade in the die assembly process are very common problems in the blade production process, the existing die assembly gap design and detection of the trailing edge of the blade are that profile curves of cross sections are cut out from 3D software, and then the profile curves are led into CAD for manual debugging design; the existing technical problems; 1. the curve offset in CAD makes it difficult to accurately describe the actual laydown thickness of the trailing edge of the blade; 2. the existing method has low efficiency and very repeated actions.
Disclosure of Invention
The present invention has been made in view of the above-described problems occurring in the prior art. In order to improve the adjustment efficiency and fineness of the trailing edge of the wind power blade, the invention provides a method for designing the trailing edge of the wind power blade. Determining the boundary of a design interval according to input parameters, setting thickness points in the interval, calculating the thickness distribution and UD thickness distribution of each position, and superposing the thickness distribution of the core material in the interval and the UD thickness distribution in the interval to obtain all distribution data of the area, wherein the input parameters are simple and the operation is convenient; the thickness distribution data are mapped into a three-dimensional model, the thickness of each point is calculated completely according to the layering of UD, and the chamfer angle of the core material is completely consistent with the actual value; and the starting point position and the UD starting point position of the core material are adjusted to obtain proper die assembly gaps to finish the design of the die assembly size of the cross section, so that the die assembly is efficient, and the gap adjustment of one cross section can be finished in a few minutes.
Therefore, a wind power blade trailing edge design method is provided.
In order to solve the technical problems, the invention provides a wind power blade trailing edge design method, which comprises the following steps:
determining the boundary of a design interval according to input parameters and setting thickness points in the interval; calculating the thickness distribution of each position according to the obtained interval boundary and parameters of the layering and staggered layering, and superposing to obtain UD thickness distribution data of each thickness distribution point, and superposing to obtain interval distribution data; mapping the thickness distribution data into a three-dimensional model, creating a visual model, and adjusting the distance between the core material and the side and the distance between the core material and the UD to obtain a reasonable die assembly gap through an application program, thereby completing the design of the die assembly size of the cross section.
As a preferable scheme of the wind power blade trailing edge design method, the invention comprises the following steps: the input parameters include core distance, core thickness, core chamfer ratio, UD distance, UD monolayer thickness, UD staggered layer size, UD layer number and skin thickness.
As a preferable scheme of the wind power blade trailing edge design method, the invention comprises the following steps: the boundary of the design interval comprises the boundary [ X ] of the design interval determined according to the input parameters min ,X max ]And prescribing thickness points at n positions in the interval, wherein the specific calculation formula is as follows:
the interval start and end are expressed as:
X min ＝min(CORE ds ,UD ds )
X max ＝max(CORE de ,UD de )
the core chamfering endpoint is expressed as:
CORE de ＝CORE ds +CORE T *CORE r
the UD layering endpoint was expressed as:
UD de ＝UD ds +UD w +(UD num -1)*UD r
wherein X is min X is the start point of the interval max For the end of interval, CORE ds UD as core material starting point ds For UD origin, CORE de For core chamfering end point, UD de For UD ply termination, CORE r Chamfering of core material, UD w For UD width, UD num For UD layer number, UD r Is UD staggered layer.
As a preferable scheme of the wind power blade trailing edge design method, the invention comprises the following steps: the thickness distribution points comprise parameters of core material thickness distribution and UD thickness calculated according to the layering of the core material and the layering of the rear edge UD and the staggered layers thereof.
The thickness distribution of the core material comprises the following three conditions of calculating the thickness distribution of each position:
F1(s)＝0，if:s<CORE ds
F1(s)＝(s-CORE ds )/CORE r ，if:CORE ds <s<CORE de
F1(s)＝CORE t ，if:s>CORE de
the UD thickness comprises the UD thickness distribution of each thickness distribution point obtained by superposing the values of each layer at the thickness distribution point:
f(s,i)＝UD nt ，i＝[i,UD num ]
if:[UD ds +(i-1)*UD r ]<s<[UD ds +(i-1)*UD r +UD w ]
F2(s,i)＝∫∫f(s,i)dsdi
wherein F1(s) is the thickness distribution of the CORE material, F2 (s, i) is UD thickness, CORE t Is the thickness of the core material, s is the thickness point variable, UD nt For UD thickness, UD w For UD width, i is the number of layers.
As a preferable scheme of the wind power blade trailing edge design method, the invention comprises the following steps: the interval distribution data comprises the steps of superposing thickness distribution of the core material in the interval and thickness distribution of the UD in the interval as follows:
F＝F1(s)+F2(s,i)
accumulating the thickness values of the skin on the interval to obtain all distribution data of the area:
N＝F+SHELL t ＝F1(s)+F2(s,i)+SHELL t
wherein F is the thickness distribution of the core material and UD in the interval, N is the overall distribution data of the interval where the skin thickness value is accumulated, and SHELL t Is the skin thickness.
As a preferable scheme of the wind power blade trailing edge design method, the invention comprises the following steps: the data mapping comprises the following specific processes of calling the curve offset and the point offset function in Catia and mapping the thickness distribution data into the three-dimensional model:
storing the core material thickness distribution and UD thickness and all calculated distribution data in a table, wherein each row represents a position of a blade, each column represents a thickness value, and Catia provides an interface for secondary development: the curve offset function is surface.transform.transform (), the curve name, offset and offset direction are transferred by calling the function, the offset function of the point is part.transform.transform (), the original curve and the point are translated as required by calling the function and transferring the point name, offset and offset direction, so that a new curve is obtained, thickness distribution data are mapped into a three-dimensional model of the blade through the parameters, and the generated three-dimensional blade is rendered to generate a visual picture.
As a preferable scheme of the wind power blade trailing edge design method, the invention comprises the following steps: the die assembly gap comprises the steps of combining the measurement of each gap point, adjusting the starting point position of the core material and the starting point position of the UD to finally obtain a proper die assembly gap, and completing the design of the die assembly size of the section, wherein the specific process is as follows:
measuring each clearance point of the rear edge of the wind power blade, adjusting the starting point position of the core material and the starting point position of the UD according to the measured die closing clearance data, measuring the die closing clearance again after adjustment, and comparing the measured data with the die closing clearance in an ideal state: when the die closing gap is not in accordance with the requirement, the starting point position of the core material and the starting point position of the UD are required to be continuously adjusted, the process is iterated until the die closing gap reaches 2-10mm, data of parameters of core material chamfering, core material edge distance, UD edge distance and UD staggered layer at the moment are recorded and stored, and the gap of a die closing bonding area is ensured to be controlled within the range of 2-10mm all the time.
The invention further aims to provide a system of the wind power blade trailing edge design method, which realizes rapid modeling and optimal design of the blade trailing edge through a thickness distribution module, a three-dimensional mapping module and a visual model module, and greatly improves design efficiency; the section mold closing design module can combine the measurement data to adjust each clearance point, so that a proper mold closing clearance is obtained, and the design accuracy is ensured.
The wind power blade trailing edge design system is characterized by comprising a thickness distribution module, a three-dimensional mapping module, a visual model module and a section die assembly design module.
And the thickness distribution module is used for determining the boundary of the designed interval and setting thickness points in the interval, and overlapping to obtain UD thickness distribution of each thickness distribution point.
The three-dimensional mapping module creates other surface models and maps the thickness distribution data into the three-dimensional models.
And the visual model module displays the three-dimensional model on a visual interface.
And the section mould closing design module is used for adjusting the starting point positions of the core material and the UD to obtain a proper mould closing gap and finishing the section mould closing size design.
A computer device comprising a memory and a processor, said memory storing a computer program, characterized in that the processor, when executing said computer program, implements the steps of a method of designing a trailing edge of a wind power blade.
A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of a method of designing a trailing edge of a wind power blade.
The invention has the beneficial effects that: the input parameters are simple, and the operation is convenient; the precision is high, the thickness of each point is calculated completely according to the layering of UD, and the core chamfer is completely consistent with the actual; the efficiency is high, and the clearance adjustment of one section can be completed in a few minutes.
Drawings
For a clearer description of the technical solutions of embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a flow chart of a method for designing a trailing edge of a wind turbine blade according to an embodiment of the invention.
FIG. 2 is a flow chart of a wind turbine blade trailing edge design model of a wind turbine blade trailing edge design method according to an embodiment of the invention.
FIG. 3 is a blade trailing edge clamp clearance design tool diagram for a wind power blade trailing edge design method according to an embodiment of the invention.
FIG. 4 is a thickness profile of a wind blade trailing edge core material according to one embodiment of the present invention.
FIG. 5 is a graph of the location of the boundary and thickness points of the trailing edge section of a wind blade according to one embodiment of the present invention.
FIG. 6 is a wind blade trailing edge visualization of a method for designing a wind blade trailing edge according to an embodiment of the invention.
FIG. 7 is a schematic diagram of a mold clamping gap of a wind turbine blade trailing edge according to an embodiment of the present invention.
FIG. 8 is a wind blade trailing edge design model of a wind blade trailing edge design method according to an embodiment of the invention.
FIG. 9 is a diagram showing a core thickness distribution and UD thickness distribution area of a wind turbine blade trailing edge design method according to an embodiment of the present invention.
FIG. 10 is a diagram of exemplary blade trailing edge clamp clearance design tool graph data for a method of designing a trailing edge of a wind power blade according to an embodiment of the present invention.
FIG. 11 is a diagram illustrating an exemplary blade profile 80m for a wind turbine blade trailing edge design method according to an embodiment of the present invention.
FIG. 12 is a schematic workflow diagram of a wind blade trailing edge design system according to an embodiment of the present invention.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
While the embodiments of the present invention have been illustrated and described in detail in the drawings, the cross-sectional view of the device structure is not to scale in the general sense for ease of illustration, and the drawings are merely exemplary and should not be construed as limiting the scope of the invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Also in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixed connection, detachable connection or integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
1-2, a wind turbine blade trailing edge design method is provided according to a first embodiment of the present invention, including:
s1: and determining the boundary of the design interval according to the input parameters and setting thickness points in the interval.
Further, the input parameters include core distance, core thickness, core chamfer ratio, UD distance, UD monolayer thickness, UD dislocation size, UD layer number, and skin thickness, and the PS side trailing edge UD ply thickness calculation and the core thickness calculation for the corresponding coverage area, and the SS side trailing edge UD ply thickness calculation and the core thickness calculation for the corresponding coverage area are performed.
It should be noted that, the boundary [ X ] of the design interval is determined according to the input parameters min ,X max ]And prescribing thickness points at n positions in the interval, wherein the specific calculation formula is as follows:
the interval start and end are expressed as:
X min ＝min(CORE ds ,UD ds )
X max ＝max(CORE de ,UD de )
the core chamfering endpoint is expressed as:
CORE de ＝CORE ds +CORE T *CORE r
the UD layering endpoint was expressed as:
UD de ＝UD ds +UD w +(UD num -1)*UD r
wherein X is min X is the start point of the interval max For the end of interval, CORE ds UD as core material starting point ds For UD origin, CORE de For core chamfering end point, UD de For UD ply termination, CORE r Chamfering of core material, UD w For UD width, UD num For UD layer number, UD r Is UD staggered layer.
S2: and calculating the thickness distribution of each position according to the obtained interval boundary and parameters of the layering and the staggered layering, and superposing to obtain UD thickness distribution data of each thickness distribution point, and superposing to obtain interval distribution data.
Further, calculating the thickness distribution and UD thickness of the core material according to the layering of the core material and the layering of the rear edge UD and the parameter of the staggered layering; the core thickness distribution includes calculating the distribution of the thickness at each location, and there are three cases of the core thickness distribution:
F1(s)＝0，if:s<CORE ds
F1(s)＝(s-CORE ds )/CORE r ，if:CORE ds <s<CORE de
F1(s)＝CORE t ，if:s>CORE de
the UD thickness comprises the UD thickness distribution of each thickness distribution point obtained by superposing the 1 st layer to the nth layer according to the value of each layer at the thickness distribution point:
f(s,i)＝UD nt ，i＝[i,UD num ]
if:[UD ds +(i-1)*UD r ]<s<[UD ds +(i-1)*UD r +UD w ]
F2(s,i)＝∫∫f(s,i)dsdi
wherein F1(s) is the thickness distribution of the CORE material, F2 (s, i) is UD thickness, CORE t Is the thickness of the core material, s is the thickness point variable, UD nt For UD thickness, UD w For UD width, i is the number of layers.
Note that, the thickness distribution of the core material in the section and the thickness distribution of UD in the section are superimposed as:
F＝F1(s)+F2(s,i)
accumulating the thickness values of the skin on the interval to obtain all distribution data of the area:
N＝F+SHELL t ＝F1(s)+F2(s,i)+SHELL t
wherein F is the thickness distribution of the core material and UD in the interval, N is the overall distribution data of the interval where the skin thickness value is accumulated, and SHELL t Is the skin thickness.
S3: mapping the thickness distribution data into a three-dimensional model, creating a visual model, and adjusting the distance between the core material and the side and the distance between the core material and the UD to obtain a reasonable die assembly gap through an application program, thereby completing the design of the die assembly size of the cross section.
Further, the curve offset and point offset functions in Catia are called, and the thickness distribution data are mapped into the three-dimensional model; repeating the steps S1 and S2 to create the model of the other surface, and finally obtaining the visualized graph shown in FIG. 6.
Storing the core material thickness distribution and UD thickness and all calculated distribution data in a table, wherein each row represents a position of a blade, each column represents a thickness value, and Catia provides an interface for secondary development: the curve offset function is surface.transform.transform (), the curve name, offset and offset direction are transferred by calling the function, the offset function of the point is part.transform.transform (), the original curve and the point are translated as required by calling the function and transferring the point name, offset and offset direction, so that a new curve is obtained, thickness distribution data are mapped into a three-dimensional model of the blade through the parameters, and the generated three-dimensional blade is rendered to generate a visual picture.
It should be noted that in the Catia, the blade model is opened, a new blade model is created, and in the new blade model, the surface.transform.transform () and part.transform.transform () functions are called to transfer the offset and offset direction data of the curve and the point to the new model; the new model performs offset operation according to the transferred data to generate a new blade model; the method comprises the steps of opening a blade model, rendering the blade by using a rendering tool to generate a visual graph, calling a visual function, converting the blade model into a visual graph, and storing the visual graph for use in a program.
It should also be noted that the reasonable die closing gap is obtained by adjusting the distance between the core material and the edge and the distance between the UD and the edge through an application program; and (3) adjusting the starting point position and the UD starting point position of the core material by combining the measurement of each gap point to finally obtain a proper die closing gap, and finishing the design of the die closing dimension of the section: measuring each clearance point of the rear edge of the wind power blade, adjusting the starting point position of the core material and the starting point position of the UD according to the measured die closing clearance data, measuring the die closing clearance again after adjustment, and comparing the measured data with the die closing clearance in an ideal state: when the die closing gap is not in accordance with the requirement, the starting point position of the core material and the starting point position of the UD are required to be continuously adjusted, the process is iterated until the die closing gap reaches 2-10mm, data of parameters of core material chamfering, core material edge distance, UD edge distance and UD staggered layer at the moment are recorded and stored, and the gap of a die closing bonding area is ensured to be controlled within the range of 2-10mm all the time.
Example 2
Referring to fig. 3-11, for one embodiment of the present invention, a wind power blade trailing edge design method is provided, and in order to verify the beneficial effects of the present invention, scientific demonstration is performed through experiments.
According to the above, the invention reduces the numerical value proportionally, prescribes the interval boundary, prescribes and calculates the numerical value according to the actual situation, tests and experiments to verify the feasibility, and the specific process of demonstration by taking the section of the blade profile 80m as an example is as follows: as shown in fig. 10, the boundary of the design section is determined from the input parameters and the thickness points of n positions in the section are set:
the thickness of the PS-side core material is 20mm, the thickness of the SS-side core material is 25mm, the thicknesses of the PS-side skin and the SS-side skin are 1.132mm, the UD layer number of the PS-side skin and the SS-side skin is 10 layers, the single-layer cloth width of the PS-side skin and the SS-side skin is 210mm, the single-layer thickness of the PS-side skin and the SS-side skin is 0.84mm, and the UD layer staggered size of the PS-side skin and the SS-side skin is 10mm.
Determining the boundary of a design interval:
TABLE 1
X min X max
min(CORE ds ,UD ds ) max(CORE de ,UD de )
30 160
The thickness distribution was calculated, and there are three cases of the thickness distribution of the core material as shown in fig. 5: first region: f1 (s) =0, if s<CORE ds The method comprises the steps of carrying out a first treatment on the surface of the Second region: f1 (s) = (s-CORE) ds )/CORE r ，if:CORE ds <s<CORE de The method comprises the steps of carrying out a first treatment on the surface of the Third region: f1 (s) =core t ，if:s>CORE de 。
TABLE 2
Position of Core thickness profile F1(s)
0-30 0
40-100 (10-30)/20
160-200 20
The thickness profiles are superimposed and the skin thicknesses are accumulated as shown in fig. 9.
The optimization adjustment parameters are designed: the distance between the PS surface and the SS surface core material is PS:140mm, SS:110mm, PS and SS chamfer is PS:7, SS: 7. the distance between the UD sides of the PS side and the SS side is PS:40mm, SS:20mm; mapping the thickness distribution data into a three-dimensional model, and adjusting the starting point position of the core material and the starting point position of the UD to obtain a proper die closing gap, wherein the clearance value is ensured to be stabilized between 2mm and 10mm, as shown in figure 11.
Repeating the steps to create a model of the other surface, obtaining a visual graph shown in fig. 7 through the test experiment, and adjusting the starting point position and the UD starting point position of the core material in combination with the measurement of each gap point to finally obtain a proper die closing gap, so that the die closing gap can be accurately kept between 5mm and 9mm all the time, and an ideal state can be maintained.
TABLE 3 Table 3
Through the optimized design of the invention, the aerodynamic resistance of the wind power blade is reduced, and the aerodynamic performance of the blade is improved; the power generation efficiency of the whole wind power system is improved, so that the energy loss is reduced; under the premise of ensuring performance, the design of the trailing edge can realize the light weight of the blade structure, reduce the fatigue load of the blade, improve the service life of the blade, improve the fatigue resistance of the blade, reduce the failure rate of the blade in long-term operation, and improve the durability and reliability of the blade, thereby reducing the maintenance cost and the downtime.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Example 3
A third embodiment of the present invention, which is different from the first two embodiments, is:
the functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only memory (ROM), a random access memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Example 4
Referring to fig. 12, a fourth embodiment of the present invention provides a wind turbine blade trailing edge design system, which includes a thickness distribution module, a three-dimensional mapping module, a visualization model module, and a cross-section mold closing design module.
The thickness distribution module determines the boundary of the design interval and sets thickness points in the interval, and the UD thickness distribution of each thickness distribution point is obtained through superposition.
The three-dimensional mapping module creates other face models and maps the thickness distribution data into the three-dimensional models.
The visual model module displays the three-dimensional model on a visual interface.
And the section mould closing design module adjusts the starting positions of the core material and the UD to obtain a proper mould closing gap, and the section mould closing size design is completed.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.

Claims (10)

1. A wind power blade trailing edge design method is characterized in that: comprising the steps of (a) a step of,
determining the boundary of a design interval according to input parameters and setting thickness points in the interval;
calculating the thickness distribution of each position according to the obtained interval boundary and parameters of the layering and staggered layering, and superposing to obtain UD thickness distribution data of each thickness distribution point, and superposing to obtain interval distribution data;
mapping the thickness distribution data into a three-dimensional model, creating a visual model, and adjusting the distance between the core material and the side and the distance between the core material and the UD to obtain a reasonable die assembly gap through an application program, thereby completing the design of the die assembly size of the cross section.
2. The method for designing the trailing edge of a wind power blade according to claim 1, wherein: the input parameters include core distance, core thickness, core chamfer ratio, UD distance, UD monolayer thickness, UD staggered layer size, UD layer number and skin thickness.
3. A wind power blade trailing edge design method as claimed in claim 2, wherein: the boundary of the design interval comprises the boundary [ X ] of the design interval determined according to the input parameters min ,X max ]And prescribing thickness points at n positions in the interval, wherein the specific calculation formula is as follows:
the interval start and end are expressed as:
X min ＝min(CORE ds ,UD ds )
X max ＝max(CORE de ,UD de )
the core chamfering endpoint is expressed as:
CORE de ＝CORE ds +CORE T *CORE r
the UD layering endpoint was expressed as:
UD de ＝UD ds +UD w +(UD num -1)*UD r
wherein X is min X is the start point of the interval max For the end of interval, CORE ds UD as core material starting point ds For UD origin, CORE de For core chamfering end point, UD de For UD ply termination, CORE r Chamfering of core material, UD w For UD width, UD num For UD layer number, UD r Is UD staggered layer.
4. A wind power blade trailing edge design method as claimed in claim 3, wherein: the thickness distribution points comprise parameters of core material thickness distribution and UD thickness according to the layering of the core material and the layering of the rear edge UD and the staggered layers thereof;
the thickness distribution of the core material comprises the following three conditions of calculating the thickness distribution of each position:
F1(s)＝0，if:s<CORE ds
F1(s)＝(s-CORE ds )/CORE r ，if:CORE ds <s<CORE de
F1(s)＝CORE t ，if:s>CORE de
the UD thickness comprises the UD thickness distribution of each thickness distribution point obtained by superposing the values of each layer at the thickness distribution point:
f(s,i)＝UD nt ，i＝[i,UD num ]
if:[UD ds +(i-1)*UD r ]<s<[UD ds +(i-1)*UD r +UD w ]
F2(s,i)＝∫∫fs,i)dsdi
wherein F1(s) is the thickness distribution of the CORE material, F2 (s, i) is UD thickness, CORE t Is the thickness of the core material, s is the thickness point variable, UD nt For UD thickness, UD w For UD width, i is the number of layers.
5. The method for designing the trailing edge of a wind power blade according to claim 4, wherein: the interval distribution data comprises the steps of superposing thickness distribution of the core material in the interval and thickness distribution of the UD in the interval as follows:
F＝F1(s)+F2(s,i)
accumulating the thickness values of the skin on the interval to obtain all distribution data of the area:
N＝F+SHELL t ＝F1(s)+F2(s,i)+SHELL t
wherein F is the thickness distribution of the core material and UD in the interval, N is the overall distribution data of the interval where the skin thickness value is accumulated, and SHELL t Is the skin thickness.
6. The method for designing the trailing edge of a wind power blade according to claim 5, wherein: the data mapping comprises the following specific processes of calling the curve offset and the point offset function in Catia and mapping the thickness distribution data into the three-dimensional model:
storing the core material thickness distribution and UD thickness and all calculated distribution data in a table, wherein each row represents a position of a blade, each column represents a thickness value, and Catia provides an interface for secondary development: the curve offset function is surface.transform.transform (), the curve name, offset and offset direction are transferred by calling the function, the offset function of the point is part.transform.transform (), the original curve and the point are translated as required by calling the function and transferring the point name, offset and offset direction, so that a new curve is obtained, thickness distribution data are mapped into a three-dimensional model of the blade through the parameters, and the generated three-dimensional blade is rendered to generate a visual picture.
7. The method for designing the trailing edge of a wind power blade according to claim 6, wherein: the die assembly gap comprises the steps of combining the measurement of each gap point, adjusting the starting point position of the core material and the starting point position of the UD to finally obtain a proper die assembly gap, and completing the design of the die assembly size of the section, wherein the specific process is as follows:
measuring each clearance point of the rear edge of the wind power blade, adjusting the starting point position of the core material and the starting point position of the UD according to the measured die closing clearance data, measuring the die closing clearance again after adjustment, and comparing the measured data with the die closing clearance in an ideal state: when the die closing gap is not in accordance with the requirement, the starting point position of the core material and the starting point position of the UD are required to be continuously adjusted, the process is iterated until the die closing gap reaches 2-10mm, data of parameters of core material chamfering, core material edge distance, UD edge distance and UD staggered layer at the moment are recorded and stored, and the gap of a die closing bonding area is ensured to be controlled within the range of 2-10mm all the time.
8. A system employing the wind power blade trailing edge design method according to any one of claims 1 to 7, characterized in that: the device comprises a thickness distribution module, a three-dimensional mapping module, a visual model module and a section mould closing design module;
the thickness distribution module is used for determining the boundary of a design interval and setting thickness points in the interval, and overlapping to obtain UD thickness distribution of each thickness distribution point;
the three-dimensional mapping module creates other surface models and maps the thickness distribution data into the three-dimensional model;
the visual model module displays the three-dimensional model on a visual interface;
and the section mould closing design module is used for adjusting the starting point positions of the core material and the UD to obtain a proper mould closing gap and finishing the section mould closing size design.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
CN202311072578.3A 2023-08-24 2023-08-24 Wind power blade trailing edge design method and system Withdrawn CN117454575A (en)

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Application Number Priority Date Filing Date Title
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